Java Code Examples for io.reactivex.Single#test()

public static void main(String[] args) throws Throwable {
    TestScheduler scheduler = new TestScheduler();

    Single<Long> s1 = Single.timer(1, TimeUnit.SECONDS, scheduler);
    Single<String> s2 = Single.just("Hello");
    Single<String> r = Single.zip(s1, s2, (t, s) -> t + " -> " + s);

    TestObserver<String> testObserver = r.test();

    testObserver.assertNoValues();

    scheduler.advanceTimeBy(500, TimeUnit.MILLISECONDS);
    testObserver.assertNoValues();

    scheduler.advanceTimeBy(600, TimeUnit.MILLISECONDS);
    testObserver
            .assertNoErrors()
            .assertValue("0 -> Hello");
}
 

@Test public void When_Call_OnLegalMock_If_Method_Return_Type_Is_Single_Then_Get_Object()
    throws NoSuchMethodException {
  Method method = Providers.class.getDeclaredMethod("single");
  Rx2Retrofit annotation = PlaceholderRetrofitAnnotation.class.getAnnotation(Rx2Retrofit.class);
  Metadata<Rx2Retrofit> metadata = new Metadata(Providers.class,
      method, null, annotation, method.getGenericReturnType());

  Single single = (Single) rx2RetrofitInterceptor.onLegalMock(new Mock(), metadata);
  TestObserver<Mock> subscriber = single.test();
  subscriber.awaitTerminalEvent();
  subscriber.assertNoErrors();
  subscriber.assertValueCount(1);

  Mock mock = subscriber.values().get(0);
  assertNotNull(mock);
}
 

@Test
public void When_Call_OnLegalMock_If_Method_Return_Type_Is_Single_Response_Then_Get_Response()
    throws NoSuchMethodException {
  Method method = Providers.class.getDeclaredMethod("singleResponseMock");
  Rx2Retrofit annotation = PlaceholderRetrofitAnnotation.class.getAnnotation(Rx2Retrofit.class);
  Metadata<Rx2Retrofit> metadata = new Metadata(Providers.class,
      method, null, annotation, method.getGenericReturnType());

  Single single = (Single) rx2RetrofitInterceptor.onLegalMock(new Mock(), metadata);
  TestObserver<Response<Mock>> subscriber = single.test();
  subscriber.awaitTerminalEvent();
  subscriber.assertNoErrors();
  subscriber.assertValueCount(1);

  Response<Mock> response = subscriber.values().get(0);
  assertTrue(response.isSuccessful());
  assertNotNull(response.body());
}
 

@Test public void When_Call_OnIllegalMock_If_Method_Return_Type_Is_Single_Then_Get_Error_Single()
    throws NoSuchMethodException, IOException {
  Method method = Providers.class.getDeclaredMethod("single");
  Rx2Retrofit annotation = PlaceholderRetrofitAnnotation.class.getAnnotation(Rx2Retrofit.class);
  Metadata<Rx2Retrofit> metadata = new Metadata(Providers.class,
      method, null, annotation, method.getGenericReturnType());

  Single single = (Single) rx2RetrofitInterceptor.onIllegalMock(new AssertionError(), metadata);
  TestObserver<List<Mock>> subscriber = single.test();

  subscriber.awaitTerminalEvent();
  subscriber.assertNoValues();

  HttpException httpException = (HttpException) subscriber.errors().get(0);
  assertThat(httpException.getMessage(), is("HTTP 404 null"));
}
 

@Test
public void When_Call_OnIllegalMock_If_Method_Return_Type_Is_Single_Response_Then_Get_Response_Body_Null()
    throws NoSuchMethodException, IOException {
  Method method = Providers.class.getDeclaredMethod("singleResponseMock");
  Rx2Retrofit annotation = PlaceholderRetrofitAnnotation.class.getAnnotation(Rx2Retrofit.class);
  Metadata<Rx2Retrofit> metadata = new Metadata(Providers.class,
      method, null, annotation, method.getGenericReturnType());

  Single single = (Single) rx2RetrofitInterceptor
      .onIllegalMock(new AssertionError("BOOM!"), metadata);
  TestObserver<Response<Mock>> subscriber = single.test();
  subscriber.awaitTerminalEvent();
  subscriber.assertNoErrors();
  subscriber.assertValueCount(1);

  Response<Mock> response = subscriber.values().get(0);
  assertNull(response.body());
  assertFalse(response.isSuccessful());
  assertThat(response.errorBody().string(), is("BOOM!"));
}
 

@Test public void When_Call_OnIllegalMock_Response_With_Custom_Response_Adapter_Adapt_It()
    throws NoSuchMethodException, IOException {
  Method method = Providers.class.getDeclaredMethod("singleResponseMock");
  Rx2Retrofit annotation =
      PlaceholderRetrofitErrorResponseAdapterAnnotation.class.getAnnotation(Rx2Retrofit.class);
  Metadata<Rx2Retrofit> metadata = new Metadata(Providers.class,
      method, null, annotation, method.getGenericReturnType());

  Single single =
      (Single) rx2RetrofitInterceptor.onIllegalMock(new AssertionError("BOOM!"), metadata);
  TestObserver<Response<Mock>> subscriber = single.test();
  subscriber.awaitTerminalEvent();
  subscriber.assertNoErrors();
  subscriber.assertValueCount(1);

  Response<Mock> response = subscriber.values().get(0);
  assertNull(response.body());
  assertThat(response.errorBody().string(), is("{'message':'BOOM!'}"));
}
 

@Test
public void test() {
  TestScheduler testScheduler = new TestScheduler();

  final Single<List<Integer>> first = Single.timer(2, TimeUnit.SECONDS, testScheduler)
          .map(u -> Arrays.asList(1, 2, 3));
  final Single<List<Integer>> second = Single.just(Collections.emptyList());
  final Single<List<Integer>> third = Single.just(Collections.singletonList(4));
  final Single<List<Integer>> fourth = Single.just(Collections.singletonList(5));

  Single<List<Integer>> subject = Observable
    .fromIterable(Arrays.asList(first, second, third, fourth))
    .concatMapSingle(single -> single)
    .reduce(new ArrayList<>(), (seed, items) -> {
      seed.addAll(items);
      return seed;
    });

    TestObserver<List<Integer>> testObserver = subject.test();
    testScheduler.advanceTimeBy(3, TimeUnit.SECONDS);

    System.out.println(testObserver.values());
    testObserver.assertValue(list -> list.equals(Arrays.asList(1, 2, 3, 4, 5))); 
    // 5 is currently missing ; fourth was never subscribed in the first place
}
 

public static <T> T testSingle(Single<T> single) {
    assertNotNull("Single itself was null", single);
    // If you don't do this it blocks trying to do the operation and therefore can't observe the results
    single = single.subscribeOn(Schedulers.io());
    TestObserver<T> observer = single.test();
    assertTrue("Observer failed to reach terminal event", observer.awaitTerminalEvent());
    observer.assertNoErrors();
    T object = observer.values().get(0);
    assertNotNull("Returned object was null - RxJava should not allow this", object);
    return object;
}
 

@Test
public void queueOperations() {
  when(peripheralOperation1.result()).thenReturn(operationResultSubject1.hide());
  when(peripheralOperation2.result()).thenReturn(operationResultSubject2.hide());
  when(peripheralOperation3.result()).thenReturn(operationResultSubject3.hide());
  when(peripheralOperation4.result()).thenReturn(operationResultSubject4.hide());

  Single<Irrelevant> op1 = corePeripheralManager.queueOperation(peripheralOperation1);
  verify(peripheralOperation1, times(0)).execute(any());

  Single<Irrelevant> op2 = corePeripheralManager.queueOperation(peripheralOperation2);
  verify(peripheralOperation2, times(0)).execute(any());

  Single<Irrelevant> op3 = corePeripheralManager.queueOperation(peripheralOperation3);
  verify(peripheralOperation3, times(0)).execute(any());

  op1.test();
  op2.test();
  TestObserver op3Observer = op3.test();

  verify(peripheralOperation1).execute(any());
  verify(peripheralOperation2, times(0)).execute(any());

  // Subscriber for Operation 3 decides they want to cancel the operation.
  op3Observer.dispose();

  operationResultSubject1.onSuccess(Irrelevant.INSTANCE);
  verify(peripheralOperation2).execute(any());

  Single<Irrelevant> op4 = corePeripheralManager.queueOperation(peripheralOperation4);
  op4.test();
  verify(peripheralOperation4, times(0)).execute(any());

  operationResultSubject2.onError(new Exception());
  verify(peripheralOperation4).execute(any());

  // Operation 3 should never have executed.
  verify(peripheralOperation3, times(0)).execute(any());
}
 

@Test
public void oneToOne() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Single<HelloResponse> resp = Single.just(HelloRequest.getDefaultInstance()).compose(stub::sayHello);
    TestObserver<HelloResponse> test = resp.test();

    test.awaitTerminalEvent(3, TimeUnit.SECONDS);
    test.assertError(t -> t instanceof StatusRuntimeException);
    test.assertError(t -> ((StatusRuntimeException)t).getStatus() == Status.INTERNAL);
}
 

@Test
public void manyToOne() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Single<HelloResponse> resp = Flowable.just(HelloRequest.getDefaultInstance()).as(stub::sayHelloReqStream);
    TestObserver<HelloResponse> test = resp.test();

    test.awaitTerminalEvent(3, TimeUnit.SECONDS);
    test.assertError(t -> t instanceof StatusRuntimeException);
    test.assertError(t -> ((StatusRuntimeException)t).getStatus() == Status.INTERNAL);
}
 

@Test
public void servicesCanCallOtherServices() throws InterruptedException {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);

    Single<String> chain = Single.just(request("X"))
            // one -> one
            .compose(stub::sayHello)
            .map(ChainedCallIntegrationTest::bridge)
            .doOnSuccess(System.out::println)
            // one -> many
            .as(stub::sayHelloRespStream)
            .map(ChainedCallIntegrationTest::bridge)
            .doOnNext(System.out::println)
            // many -> many
            .compose(stub::sayHelloBothStream)
            .map(ChainedCallIntegrationTest::bridge)
            .doOnNext(System.out::println)
            // many -> one
            .as(stub::sayHelloReqStream)
            .map(ChainedCallIntegrationTest::bridge)
            .doOnSuccess(System.out::println)
            // one -> one
            .compose(stub::sayHello)
            .map(HelloResponse::getMessage)
            .doOnSuccess(System.out::println);


    TestObserver<String> test = chain.test();

    test.awaitTerminalEvent(2, TimeUnit.SECONDS);
    test.assertComplete();
    test.assertValue("[<{[X]}> :: </[X]/> :: <\\[X]\\> :: <([X])>]");
}
 

@Test
public void oneToOne() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Single<HelloResponse> resp = Single.just(HelloRequest.getDefaultInstance()).compose(stub::sayHello);
    TestObserver<HelloResponse> test = resp.test();

    test.awaitTerminalEvent(3, TimeUnit.SECONDS);
    test.assertError(t -> t instanceof StatusRuntimeException);
    test.assertError(t -> ((StatusRuntimeException)t).getStatus().getCode() == Status.Code.INTERNAL);
}
 

@Test
public void manyToOne() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Flowable<HelloRequest> req = Flowable.just(HelloRequest.getDefaultInstance());
    Single<HelloResponse> resp = req.as(stub::sayHelloReqStream);
    TestObserver<HelloResponse> test = resp.test();

    test.awaitTerminalEvent(3, TimeUnit.SECONDS);
    test.assertError(t -> t instanceof StatusRuntimeException);
    // Flowable requests get canceled when unexpected errors happen
    test.assertError(t -> ((StatusRuntimeException)t).getStatus().getCode() == Status.Code.INTERNAL);
}
 

@Test
public void oneToOne() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Single<String> rxRequest = Single.just("World");
    Single<String> rxResponse = rxRequest
            .map(this::toRequest)
            .compose(stub::sayHello)
            .map(this::fromResponse);

    TestObserver<String> test = rxResponse.test();
    test.awaitTerminalEvent(1, TimeUnit.SECONDS);

    test.assertNoErrors();
    test.assertValue("Hello World");
}
 

@Test
public void manyToOne() {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);
    Flowable<String> rxRequest = Flowable.just("A", "B", "C");
    Single<String> rxResponse = rxRequest
            .map(this::toRequest)
            .as(stub::sayHelloReqStream)
            .map(this::fromResponse);

    TestObserver<String> test = rxResponse.test();
    test.awaitTerminalEvent(1, TimeUnit.SECONDS);

    test.assertNoErrors();
    test.assertValue("Hello A and B and C");
}